Watch-winding chuck



B. J. BROWN. WATCH WINDING CHUCK. APPLICATION FILED 11m: 10, 1920.

Patented Nov. '7, 1922.

INVENTOR 5, JBeomv ATTORNE wind the watches on hand and this PatentedNov. 7, 1922.

retinas BASCOM J. BROWN, OF ENSLEY, ALABAIVIA.

WATCH-WINDING CHUCK.

Application filed June 10, 1920. Serial No. 887,812.

To all whom it may concern:

Be it known that I, BASCOM J. BROWN. a citizen of the United States ofAmerica, residing at Ensley, in the county of Jefierson and State ofAlabama, have invented certain new and useful Improvements inWatch-Winding Chucks, of which the following is a specification.

This invention relates to a watch makers tool especially adapted forwinding all sizes of watches. At the present time watch makers andrepairers are required daily to involves a very considerable waste oftime and energy.

The object of this invention is to provide a very simple and inexpensivechuck or tool adapted to be inserted in the watch makers lathe and whichcarries a rubber or friction pad of such shape and dimension as toreceive the various sizes of watch crowns and to frictionally grip sameso that the crown is'turned with the chuck and the watch thusmechanically wound.

It is of especial importance in connection with my invention to notethat the watch maker skilled in the art can by hand so regulate thefrictional engagement between the crown and the friction pad of thechuck as to insure slippage when the spring is sufficiently wound. Inthis way the watches with the longest springs and small wristwatcheswith lightest springs can all be wound with the same device and withoutdanger of breaking the spring.

While it is understood that my invention may be variously constructed, Ihave illustrated' in the accompanying drawings what I regard as thepreferred embodiment of the same.

As illustrated in the drawings Fig. 1 shows the chuck in side elevationwith a watch crown. pressed thereagainst for the purpose of winding thewatch.

Fig. 2 is an end view of the chuck; and

Fig. 3 is a detail sectional view through the friction pad.

Fig. 4 is a cross-sectional View through the chuck clamp showing therubber pad in elevation.

Similar reference numerals refer to similar parts throughout thedrawings.

The chuck comprises a body member 1 having a shank 2 adapted to fit intothe ordinary watch makers lathe. The body has a knurled rim 3 and withinis threaded to receive the threaded extension 4 on the chuck member 5,which is provided with a knurled rim 6. This chuck member 5 is providedwith.an enlarged annular opening 6 at its outer end through whichprojects the concave working face 7 of a friction pad 8 which is held inthe chuck by be ing clamped between the members 1 and 5 and which may bemade of rubber or any suitable friction material. The concave workingface of the rubber pad is concentric with the axis of the chuck shank 2and is wide enough to accomodate the largest watch crowns. The concaveworking face gives the most satisfactory frictional engagement with thecrowns of different sizes that may be fitted thereinto.

Having assembled the chuck in the lathe and started the lathe, thewatches are wound as fast as they can be picked up and their crownspressed to the rapidly rotating friction pad. When the spring issufficiently wound its resistance causes the crown to slip, thusautomatically protecting the spring. The friction pads are inexpensivelyand readily replaceable so that the life of the tool is indefinite. Thetype of the friction pad holder may be widely varied and theconstruction and material of the friction pad itself may be changed tomeet the different conditions. but I have obtained best results from asoft rubber pad.

Without intending to limit myself to the specific details ofconstruction described, what I claim as new and desire to secure byLetters Patent, is

1. A watch winding tool comprising a chuck having a shank adapted to fitinto a watchmakers lathe and having a socket. a rubber friction padmounted in said socket and having in its outer end a deeply indentedcone shaped seat, the axis of which is in alignment with the axis of theshank, and demountable means to clamp said pad in said chuck socket.

2. In a watch winding tool, a chuck having a shank adaptedto fit into awatchmakers lathe, a recess in the outer end of said chuck, a rubberfriction pad having chuck to clamp the pad base firmly in said its baseadapted to fit into said recess and recess, substantially as described.10 having a reduced outer end formed with In testimony whereof I afiixmy signaa deeply indented cone shaped socket disture. v

osed with its axis in ali ment with the xis of theshank, and a sa divsleeve adapt- ,BAbGOM T O ed to slip over'the indented end of the padWitness: and to have threaded engagement with the Norma WELSH.

